2000 Saturn SC2 Power Loss from stop and going up hill.

Tiny
JULIEFLYNN
  • MEMBER
  • 2000 SATURN SC2
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 11,300 MILES
Ever since 'shady' mechanic replaced "throttle control valve" and a "temperature sensor" on my engine, I have loss of power. My car tries to shift gears while going up hills and I feel the car begin to shift as I see RPM's waver a tad lower but then the "pull" kicks in like I let off the gas (but I haven't!) And then the RPM's rev back up a couple seconds later until it finally does shift. Only up hills did I receive this problem. Also car is very slow to start accelerating from a dead stop. Took to a wonderful GMC dealership who's very attentive to what I'm trying to achieve. I had previously (less than 9 mos ago) replaced fuel pump/fuel filter with the previous "shady" guys. This GMC dealership has sense replaced my first catalytic converter which allowed me to feel more power from a dead stop however shifting problem still there. Dealer's tech, mechanic and spouse all say they can't tell but none of them have taken it up the hills I do on my way to work- giving it the power I typically have for years. I am sole owner of this car and know all that's been done to it- I don't trust this "shady" mechanic who may have not put good parts on my car. I see all these problems resulting in same thing. Fuel pump/fuel filter etc. I really need to know before I pay for one again if that's a problem. Husband says it's my "kickdown cable" but I can't find one on my car via any diagrams I see. Odd that it tries to shift and doesn't at first, but then finally kicks in w/out pushing down on gas pedal any farther.
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Wednesday, May 20th, 2009 AT 5:37 PM

7 Replies

Tiny
DOCFIXIT
  • EXPERT
Hi
Your transmission is electronicaly controled as to shifting. Need to have a scan tool hooked up and check out trans sensors and solenoids for correct operation. This will tell what needs repaired.
Let me know
Thanks for donate
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Thursday, May 21st, 2009 AT 10:19 AM
Tiny
JULIEFLYNN
  • MEMBER
I'll have dealer hook up to those areas and find out what is going on. I did replace the plug wires myself today and that eliminated the hesitation when I first get going. Also since I have that feeling of more power going up hills I don't down-shift in order to feel that odd delay. I wonder now how long this down-shift feeling has really been there. The loss of power I believe amplified that. I'm glad to have power back at least but still worry about the transmission. I don't wish to damage it in any way. I will see if the dealer with scan for me- they certainly will hear what is going on!
Thanks guys!
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Thursday, May 21st, 2009 AT 3:29 PM
Tiny
DOCFIXIT
  • EXPERT
Glad you solved power issue the test will point out what is causing the down shift. Mostlikely shift solenoid a simple repair and will stop any possible damage to trans.
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Thursday, May 21st, 2009 AT 3:33 PM
Tiny
JULIEFLYNN
  • MEMBER
I mentioned your solution to my husband but he stated that the dealer already hooked up to my car's computer and ran for codes and that I had none coming up. Is there a different place they would have to hook into or is it all controlled in one place?

Sometimes I wish cars ran like they used to. :)
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Thursday, May 21st, 2009 AT 3:40 PM
Tiny
DOCFIXIT
  • EXPERT
They probably ran engine codes to slove power problem. This is a specific scan of the trans
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Thursday, May 21st, 2009 AT 4:20 PM
Tiny
JULIEFLYNN
  • MEMBER
I wanted to make a point to come back and post how I was able to finally get my car back in top running order. I've read too many posts across the internet that have the same issues but never say what their fix was!

I ended up not going to a transmission specialist. I never found one I could trust and spent a couple of days doing some in depth research of my own. Once I had my husband test drive with me he definitely noticed the problem as well. I ended up back at the dealership with the intent on leaving my car with them until they found the issue. Well it took them 2 days and their best specialists to find out that my 2nd cat was failing 'under load'. I however, insisted I felt changes even from a stop but you know- I was "crazy" at the time ha! Let's just say that once my 2nd cat was replaced- my car flies like it's never flown before. It feels as new as the day I purchased it and I think it's gonna last 10 more years. Apparently this 2nd cat being clogged didn't allow my car to shift properly up hills and the steepest hills it wouldn't shift at all.

Anyway thanks guys for answering my questions and having a good forum to browse though. I learned far more about my car than I ever imagined.

On a seperate note- sure dealerships cost more but to have the original parts meant for your car used in repairs seems like a more secure and long lasting choice if you can afford it. We called our dealer's service manager and bragged up how well our tech did- and received discounts on our other vehicle as well as 20% off this second repair job. It sure helped.
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Wednesday, June 17th, 2009 AT 5:22 PM
Tiny
DOCFIXIT
  • EXPERT
Thank you for letting me know the problem and solution. Ican see if Cat blocked it would slow uphill climb and cause trans to down shift.
Thanks
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Thursday, June 18th, 2009 AT 10:28 AM

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